All 16 tools are free with daily caps. Studio unlocks the unified workbench, 24-bit WAV stems, saved sessions, API access and 50× higher quotas. Two honest tiers — no upsell hidden in the middle.
All 16 tools, no signup. Drop a track, get the answer.
The unified workbench. One upload runs every module at once.
Yes — all 16 tools, every export, every quality tier. The Vocal Remover even runs locally in your browser using phase cancellation, so it costs us nothing and you nothing. Stem Splitter (4-stem separation) needs cloud GPU and is part of Studio.
Free is the no-signup, single-pass tool experience: drop an audio file, get one answer. Studio is the unified workbench — one upload runs every module at once (BPM, key, stems, MIDI, mix, release) — plus 24-bit WAV stems, saved sessions, batch upload, API access, no watermark and 50× higher daily quotas.
No. Tool pages and the Studio workbench are ad-free for every user. Ads only appear on long-form learning pages (the glossary and chart guides) where they don't interrupt a workflow.
Yes — monthly billing, cancel from a single click. Annual plans are prorated if you cancel mid-year.
Yes — BPM, key, stems, MIDI you generate are yours to use commercially without attribution on every plan.
Yes — 50% off Studio with a valid .edu / .ac.uk email. Email education@signalkey.io to claim.
No card, no signup. Drop a track and we'll show you exactly what SignalKey can do — BPM, key, stems, MIDI, mastering, the lot.